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path: root/crypto/ffc/ffc_key_generate.c
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2022-07-18Use as small dh key size as possible to support the securityTomas Mraz
Longer private key sizes unnecessarily raise the cycles needed to compute the shared secret without any increase of the real security. We use minimum key sizes as defined in RFC7919. For arbitrary parameters we cannot know whether they are safe primes (we could test but that would be too inefficient) we have to keep generating large keys. However we now set a small dh->length when we are generating safe prime parameters because we know it is safe to use small keys with them. That means users need to regenerate the parameters if they want to take the performance advantage of small private key. Reviewed-by: Kurt Roeckx <kurt@roeckx.be> Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Hugo Landau <hlandau@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18480)
2021-06-17Update copyright yearMatt Caswell
Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/15801)
2021-05-29add zero strenght arguments to BN and RAND RNG callsPauli
Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/15513)
2020-10-06ffc: add _ossl to exported but internal functionsPauli
The functions updated are: ffc_generate_private_key, ffc_named_group_from_uid, ffc_named_group_to_uid, ffc_params_FIPS186_2_gen_verify, ffc_params_FIPS186_2_generate, ffc_params_FIPS186_2_validate, ffc_params_FIPS186_4_gen_verify, ffc_params_FIPS186_4_generate, ffc_params_FIPS186_4_validate, ffc_params_cleanup, ffc_params_cmp, ffc_params_copy, ffc_params_enable_flags, ffc_params_flags_from_name, ffc_params_flags_to_name, ffc_params_fromdata, ffc_params_get0_pqg, ffc_params_get_validate_params, ffc_params_init, ffc_params_print, ffc_params_set0_j, ffc_params_set0_pqg, ffc_params_set_flags, ffc_params_set_gindex, ffc_params_set_h, ffc_params_set_pcounter, ffc_params_set_seed, ffc_params_set_validate_params, ffc_params_simple_validate, ffc_params_todata, ffc_params_validate_unverifiable_g, ffc_set_digest, ffc_set_group_pqg, ffc_validate_private_key, ffc_validate_public_key and ffc_validate_public_key_partial. Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/13041)
2020-04-20Fix DH_get_nid() so that it does not cache values.Shane Lontis
DH_set0_pqg() is now responsible for caching the nid, q and length. DH with or without named safe prime groups now default to using the maximum private key length (BN_num_bits(q) - 1) when generating a DH private key. The code is now shared between fips and non fips mode for DH key generation. The OSSL_PKEY_PARAM_DH_PRIV_LEN parameter can be used during keygen to override the maximum private key length to be in the range (2 * strength ... bits(q) - 1). Where the strength depends on the length of p. Added q = (p - 1) / 2 safe prime BIGNUMS so that the code is data driven (To simplify adding new names). The BIGNUMS were code generated. Fix error in documented return value for DH_get_nid Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/11562)
2020-04-15Add DSA keygen to providerShane Lontis
Moved some shared FFC code into the FFC files. Added extra paramgen parameters for seed, gindex. Fixed bug in ossl_prov util to print bignums. Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/11303)
2020-03-07Change DH_get_nid() to set the value of q if it is not already setShane Lontis
Fixes #11108. It only sets q if a valid named group is found. The function signature was recently changed to pass a non const DH pointer in order to allow the nid to be cached internally. As an extension of this the value of q can now also be set as q is always known for named groups. The length field is also set if q is set. Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org> (Merged from https://github.com/openssl/openssl/pull/11114)
2020-02-16Add FFC param/key validationShane Lontis
Embed libctx in dsa and dh objects and cleanup internal methods to not pass libctx (This makes it consistent with the rsa changes) Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/10910)
2020-02-06Add FFC param/key generationShane Lontis
Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/10909)